How to change default message “Please enter a value with a valid mimetype.” for HTML file input


Tags: javascript,jquery,html,css,html5

Problem :

I just came across the accept attribute of <input type="file"> and i really like it as i see that i don't need to write seperate validation for input file type if i use this attribute. its very simple like

<input type="file" accept="image/*"> will accept only image files..

<input type="file" accept="audio/*"> will accept only audio files..

<input type="file" accept="video/*"> will accept only video files..

However i see that if i some how select a different file then i see an error message

Please enter a value with a valid mimetype.

i just want to know if it i can somehow change this error message and print it so something of my choice.. also is it possible to add some css to this error message ??



Solution :

Try using a little bit of JavaScript magic (mark the oninvalid attribute):

<input type="file" accept="image/*" oninvalid="setCustomValidity('Please, blah, blah, blah ')"/>

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